Donald Trump is threatening to slap tariffs on cars produced in Mexico unless the country does more to stop migrants trying to enter the U.S. From the Associated Press:

Trump told reporters at the White House on Thursday that if that “powerful incentive” but “less drastic measure” doesn’t work, he’ll go through with his standing threat to close the U.S.-Mexico border.

The Republican president had threatened last week to close the border this week unless Mexico immediately halted “ALL illegal immigration coming into the United States.” He has since praised the country for doing more.

Trump also is threatening tariffs if Mexico doesn’t halt the flow of illegal drugs across the border. And he says he’s giving Mexico “a one year warning” to comply.

House Speaker Nancy Pelosi declined to say whether Robert Mueller should testify before Congress.

“I’m not going into that. I think they should release the report. That’s where the evidence is, the information is. Let’s see the report,” Pelosi told reporters, according to the Hill. “If they don’t have anything to hide, they shouldn’t worry.”

The heads of the House Judiciary and Intelligence committees have said that Mueller should testify.

Presidential hopeful Pete Buttigieg called for abolishing the death penalty.

“It is time to face the simple fact that capital punishment as seen in America has always been a discriminatory practice and we would be a fairer and safer country when we join the ranks of modern nations who have abolished the death penalty,” he said while speaking at the National Action Network convention, Huffington Post reported.

Senator Elizabeth Warren asked the Department of Homeland Security to investigate whether the White House has overruled the Secret Service on decisions about who can meet with Donald Trump at his Mar-a-Lago estate.

The senator and presidential candidate requested the probe in a letter along with Massachusetts Rep. Steve Lynch, Talking Points Memo reports.

Access policies at Mar-a-Lago have drawn scrutiny after a Chinese national was arrested there carrying multiple cell phones and a thumb drive containing malware. The White House reportedly refused to cooperated with a prior investigation by the Government Accountability Office.

“This refusal of the White House to cooperate with this investigation, combined with the arrest earlier this week and other allegations of easy access to the President and his family at Mar-a-Lago, mean that at least one key question remains open: is the White House appropriately reviewing and making the correct recommendations regarding which individuals are granted access to the President, at Mar-a-Lago and elsewhere?” the letter reads, according to TPM.

The oversight committee has always worked with White House whistle-blowers. But the number of whistle-blowers who have come forward since Trump became president is far higher than the number who cooperated with the panel in previous administrations, according to the Atlantic.

“I thought it was a joke when someone asked me to comment on the President saying wind turbines caused cancer. We looked it up. It’s what he said!” O’Rourke said today in Iowa, MSNBC reported.

Garrett Haake (@GarrettHaake)

“I thought it was a joke when someone asked me to comment on the President saying wind turbines caused cancer. We looked it up. It’s what he said!” @BetoORourke getting some laughs in Carroll, IA as he talks about climate change & clean energy

Presidential hopeful Pete Buttigieg is addressing his use of the phrase “all lives matter,” in response to controversies over police misconduct.

“What I did not understand at that time was that phrase was coming to be used as a sort of counter-slogan to Black Lives Matter,” the South Bend, Indiana mayor said today. “Since learning about how that phrase was being used, I have stopped using it.”

Sabrina Siddiqui (@SabrinaSiddiqui)

Buttigieg on his prior “All Lives Matter” response to police conduct: "What I did not understand at that time was that phrase was coming to be used as a sort of counter-slogan to Black Lives Matter … Since learning about how that phrase was being used, I have stopped using it."

Meanwhile, more on the tricky pronunciation of the Democratic hopeful’s name: Rev. Al Sharpton pledged at his National Action Network convention today to get it right, eventually. “It took me two months to say Obama’s name right and I ended up endorsing him,” he said, according to CBS News.

Caitlin Huey-Burns (@CHueyBurns)

Sharpton tells Buttigieg he will learn to pronounce his name: “It took me two months to say Obama’s name right and I ended up endorsing him.”